/Engine/Plugins/Importers/USDImporter/Source/USDUtilities/Public/USDConversionUtils.h
Adds a payload on Prim pointing at the default prim of the layer at AbsoluteFilePath
namespace UsdUtils { void UsdUtils::AddPayload ( [UE::FUsdPrim](API\Plugins\UnrealUSDWrapper\UsdWrappers\FUsdPrim) & Prim, const TCHAR * AbsoluteFilePath, const [UE::FSdfPath](API\Plugins\UnrealUSDWrapper\UsdWrappers\FSdfPath) & TargetPrimPath, double TimeCodeOffset, double TimeCodeScale ) }